//<MStar Software>
//******************************************************************************
// MStar Software
// Copyright (c) 2010 - 2016 MStar Semiconductor, Inc. All rights reserved.
// All software, firmware and related documentation herein ("MStar Software") are
// intellectual property of MStar Semiconductor, Inc. ("MStar") and protected by
// law, including, but not limited to, copyright law and international treaties.
// Any use, modification, reproduction, retransmission, or republication of all
// or part of MStar Software is expressly prohibited, unless prior written
// permission has been granted by MStar.
//
// By accessing, browsing and/or using MStar Software, you acknowledge that you
// have read, understood, and agree, to be bound by below terms ("Terms") and to
// comply with all applicable laws and regulations:
//
// 1. MStar shall retain any and all right, ownership and interest to MStar
//    Software and any modification/derivatives thereof.
//    No right, ownership, or interest to MStar Software and any
//    modification/derivatives thereof is transferred to you under Terms.
//
// 2. You understand that MStar Software might include, incorporate or be
//    supplied together with third party's software and the use of MStar
//    Software may require additional licenses from third parties.
//    Therefore, you hereby agree it is your sole responsibility to separately
//    obtain any and all third party right and license necessary for your use of
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// 3. MStar Software and any modification/derivatives thereof shall be deemed as
//    MStar's confidential information and you agree to keep MStar's
//    confidential information in strictest confidence and not disclose to any
//    third party.
//
// 4. MStar Software is provided on an "AS IS" basis without warranties of any
//    kind. Any warranties are hereby expressly disclaimed by MStar, including
//    without limitation, any warranties of merchantability, non-infringement of
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//    even if MStar Software has been modified by MStar in accordance with your
//    request or instruction for your use, except otherwise agreed by both
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// 5. If requested, MStar may from time to time provide technical supports or
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//    ("Services").
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//    writing, Services are provided on an "AS IS" basis and the warranty
//    disclaimer set forth in Section 4 above shall apply.
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// 6. Nothing contained herein shall be construed as by implication, estoppels
//    or otherwise:
//    (a) conferring any license or right to use MStar name, trademark, service
//        mark, symbol or any other identification;
//    (b) obligating MStar or any of its affiliates to furnish any person,
//        including without limitation, you and your customers, any assistance
//        of any kind whatsoever, or any information; or
//    (c) conferring any license or right under any intellectual property right.
//
// 7. These terms shall be governed by and construed in accordance with the laws
//    of Taiwan, R.O.C., excluding its conflict of law rules.
//    Any and all dispute arising out hereof or related hereto shall be finally
//    settled by arbitration referred to the Chinese Arbitration Association,
//    Taipei in accordance with the ROC Arbitration Law and the Arbitration
//    Rules of the Association by three (3) arbitrators appointed in accordance
//    with the said Rules.
//    The place of arbitration shall be in Taipei, Taiwan and the language shall
//    be English.
//    The arbitration award shall be final and binding to both parties.
//
//******************************************************************************
//<MStar Software>

package com.android.tv.settings.inputmethod;

import com.android.tv.settings.SettingsPreferenceFragment;

import android.content.Context;
import android.hardware.input.InputDeviceIdentifier;
import android.hardware.input.InputManager;
import android.hardware.input.InputManager.InputDeviceListener;
import android.hardware.input.KeyboardLayout;
import android.os.Bundle;
import android.preference.Preference;
import android.preference.PreferenceScreen;
import android.view.InputDevice;
import android.util.Log;

import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;

public class KeyboardLayoutPickerFragment extends SettingsPreferenceFragment {
    private final static String TAG = "KeyboardLayoutPickerFragment";
    private InputManager mIm;
    private int mDeviceId;
    private KeyboardLayout[] mKeyboardLayouts;
    private HashMap<RadioButtonPreference, KeyboardLayout> mPreferenceMap =
            new HashMap<RadioButtonPreference, KeyboardLayout>();

    @Override
    public void onCreate(Bundle icicle) {
        super.onCreate(icicle);
        Bundle bundle = getArguments();
        mIm = (InputManager)getSystemService(Context.INPUT_SERVICE);
        mKeyboardLayouts = mIm.getKeyboardLayouts();
        Arrays.sort(mKeyboardLayouts);
        setPreferenceScreen(createPreferenceHierarchy());
        mDeviceId = getActivity().getIntent().getIntExtra("DeviceID", 0);
    }

    @Override
    public void onResume() {
        super.onResume();
        updateCheckedState();
    }

    @Override
    public void onPause() {
        super.onPause();
    }

    @Override
    public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen,
            Preference preference) {
        if (preference instanceof RadioButtonPreference) {
            RadioButtonPreference checkboxPref = (RadioButtonPreference)preference;
            KeyboardLayout layout = mPreferenceMap.get(checkboxPref);
            if (layout != null) {
                final InputDevice device = InputDevice.getDevice(mDeviceId);
                final InputDeviceIdentifier inputDeviceIdentifier = device.getIdentifier();
                for (Map.Entry<RadioButtonPreference, KeyboardLayout> entry : mPreferenceMap.entrySet()) {
                    if (entry.getValue().getDescriptor().equals(layout.getDescriptor())) {
                        entry.getKey().setChecked(true);
                        mIm.addKeyboardLayoutForInputDevice(inputDeviceIdentifier,
                                layout.getDescriptor());
                        mIm.setCurrentKeyboardLayoutForInputDevice(inputDeviceIdentifier,
                                layout.getDescriptor());
                    }
                    else {
                        entry.getKey().setChecked(false);
                        mIm.removeKeyboardLayoutForInputDevice(inputDeviceIdentifier,
                                entry.getValue().getDescriptor());
                    }
                }
                return true;
            }
        }
        return super.onPreferenceTreeClick(preferenceScreen, preference);
    }

    private PreferenceScreen createPreferenceHierarchy() {
        PreferenceScreen root = getPreferenceManager().createPreferenceScreen(getActivity());
        Context context = getActivity();

        for (KeyboardLayout layout : mKeyboardLayouts) {
            RadioButtonPreference pref = new RadioButtonPreference(context);
            pref.setTitle(layout.getLabel());
            pref.setSummary(layout.getCollection());
            root.addPreference(pref);
            mPreferenceMap.put(pref, layout);
        }
        return root;
    }

    private void updateCheckedState() {
        InputDevice device = InputDevice.getDevice(mDeviceId);
        if (device != null
                && !device.isVirtual()
                && device.isExternal()
                && device.isFullKeyboard()) {
            final InputDeviceIdentifier inputDeviceIdentifier = device.getIdentifier();
            String currentKeyboardLayout = mIm.getCurrentKeyboardLayoutForInputDevice(
                    inputDeviceIdentifier);
            if (currentKeyboardLayout != null) {
                KeyboardLayout layout = mIm.getKeyboardLayout(currentKeyboardLayout);
                for (Map.Entry<RadioButtonPreference, KeyboardLayout> entry : mPreferenceMap.entrySet()) {
                    if (entry.getValue().getDescriptor().equals(layout.getDescriptor())) {
                        entry.getKey().setChecked(true);
                    }
                    else {
                        entry.getKey().setChecked(false);
                    }
                }
            }
        }
    }
}
